US4740144A - Reversible radial vane air motor - Google Patents
Reversible radial vane air motor Download PDFInfo
- Publication number
- US4740144A US4740144A US07/045,934 US4593487A US4740144A US 4740144 A US4740144 A US 4740144A US 4593487 A US4593487 A US 4593487A US 4740144 A US4740144 A US 4740144A
- Authority
- US
- United States
- Prior art keywords
- air
- reverse
- motor
- exhaust
- passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/18—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F01C21/186—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet for variable fluid distribution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
- F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F01C1/3441—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
- F01C1/3442—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
- F01C20/04—Control of, monitoring of, or safety arrangements for, machines or engines specially adapted for reversible machines or engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
- F01C20/24—Control of, monitoring of, or safety arrangements for, machines or engines characterised by using valves for controlling pressure or flow rate, e.g. discharge valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
- F04C18/3442—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the inlet and outlet opening
Definitions
- This invention relates to a reversible air motor to be used in portable pneumatic tools such as a pneumatic drill or nutrunner.
- the motor is capable of achieving nearly the full horsepower of a "forward only" motor in a forward rotation. Pressurized air is routed through a bypass passage into the back of the motor through the forward exhaust. The motor provides fingertip control of the motor speed in a reverse mode.
- Radial vane air motors or pneumatic motors, are widely used in industry particularly in portable tools.
- the design of such motors has evolved over the years to an optimum geometry for both "forward only” and “reversible” types.
- the design of the reversible motors provides limited horsepower in forward operation as compared with a "forward only” motor.
- one type of reversible motor is a mirror image type that is capable of producing in a forward rotation only seventy to eighty-five percent as much horsepower as a "forward only" type motor with the same displacement.
- reversible radial vane air motors have ports and passages that conduct all or a part of the exhaust air through a reversing valve located on the end plate of the motor or in a backhead adjacent to the motor. Incorporating a governor into reversible motors makes these passages more complex, and the forward horsepower is reduced even further by backpressure through the reversing valve and the ports and passages.
- Horsepower in the forward direction of a reversible motor is often enhanced by non-symmetric placement of ports. This results in a reduction of horsepower in the reverse direction.
- Another means for increasing horsepower in the forward direction is to include complex and elaborate slides and valves, but these complex motors have proven impractical in portable air tools.
- the present invention provides a reversible radial vane air motor with manual speed control that is capable of nearly attaining the full forward horsepower of a "forward only" radial vane motor and providing greater horsepower in a forward operation than conventional reversible motors.
- the invention also provides means for utilizing a centrifugal speed governor in a forward rotation while bypassing it in a reverse rotation. Conventional types of reversing valves are not used, but rather, the invention provides a direct and unencumbered air conducting system for both forward and reverse operation of the motor.
- the invention provides a reversible radial vane air motor that includes forward inlets and exhaust means, a reverse conducting means, a reverse exhaust means, and a reverse control means.
- the reverse conducting means includes a bypass passage for conducting pressurized air from an external source to a rotor cavity of the motor such that the rotor is turned in reverse.
- An exhaust deflector acts to close the forward exhaust means and route the incoming air from the bypass passage into the rotor cavity.
- the reverse exhaust means includes a passage and an atmospheric exhaust valve.
- the reverse control means controls the flow of air in the bypass passage by variably opening a control valve.
- the reverse control means also variably controls the exhaust valve. During forward operation of the motor, both the reverse conducting means and the reverse exhaust means are closed to the flow of air.
- the motor is operated in reverse by first closing the air inlet means for forward operation. After the air supply to the motor is shut off, a reverse control lever is shifted from its forward position to a variable reverse position. This action actuates the reverse control means and opens the bypass air passage to the flow of air.
- the bypass passage allows the air to bypass air controls means for 10 forward operation of the motor.
- these forward controls may include a throttle valve and a centrifugal governor.
- the exhaust deflector closes the forward exhaust means and routes the pressurized air in the bypass passage into the rotor cavity. The air flows in the opposite direction of the forward rotation thereby turning the rotor in reverse.
- the reverse air bypasses the forward air control means and exits the motor through a reverse air exhaust that is also opened by the shifting of the reverse control lever.
- the bypass passage is closed to the flow of air
- the exhaust deflector is returned to its forward position
- the reverse exhaust is closed as the motor is returned to the forward operation mode.
- FIG. 1 is a cutaway view of one embodiment of the invention
- FIG. 2 is a cross-sectional view along line 2--2 showing the interior of the motor in FIG. 1;
- FIG. 3 is a cross-sectional view along line 3--3 showing one embodiment of the reverse air exhaust
- FIG. 4 is an exploded view of the reverse lever
- FIG. 5 shows the motor incorporated into a pneumatic drill
- FIG. 6 shows the motor incorporated within a nutrunner.
- the present invention relates to a reversible air motor that has radial vanes.
- the invention provides manual means to reverse the motor and a unique means of routing the pressurized air through the motor in a reverse direction.
- the motor is so designed as to achieve nearly full horsepower in a forward rotation as a "forward only" motor and to provide manual speed control in a reverse rotation.
- the motor may include a centrifugal governor that governs the flow of air to the motor in a forward rotation but is bypassed in reverse operation.
- the invention may be used in almost any pneumatic tool and is particularly adapted for use in portable pneumatic tools.
- FIG. 1 shows a partial cutaway and cross-sectional view of one embodiment of the invention.
- a reversible motor 10 is included within a housing 12.
- pressurized air enters an inlet bushing 14 from an external source and flows through a tiltable throttle valve 16 (shown closed in FIG. 1).
- Tiltable throttle valve 16 is operated by a throttle lever 15 which acts on push rod 21 which is engaged with lever arm 17 to tilt open throttle valve 16 against a compression throttle spring 19.
- throttle valve 16 is opened, pressurized air flows through inlet passage 18, past a centrifugal governor 20 (shown open) and into cavity 22.
- the pressurized air then flows into a slot in rear end plate 24, enters a rotor cavity 25 (shown in FIG.
- FIG. 2 illustrates the inner workings of motor 10 and the relation of the inlet and exhaust air slots.
- pressurized air enters through inlet port 42 into rotor cavity 25.
- the air pushes on radial vanes 46 such that the rotor 26 turns in a clockwise rotation as viewed in FIG. 2, and the air exhausts through slots 28, cavity 32, radial holes 34, muffler cavity 36 and out atmospheric exhaust slots 40 (not shown in the cross-sectional view of FIG. 2).
- This configuration provides a reversible radial vane motor with good horsepower and air efficiency in the forward direction.
- the tiltable throttle valve 16 To operate the motor in reverse, the tiltable throttle valve 16 must be closed. This may be accomplished as shown in FIG. 1 by releasing throttle lever 15 and allowing throttle spring 19 to close throttle valve 16. This shuts off the flow of air through inlet passage 18 to the motor, thereby stopping the forward rotation of the rotor 26.
- the motor is operated in the reverse mode by shifting lever 48, shown in phantom lines in FIG. 1 and shown in an exploded view in FIG. 4, to the reverse position.
- shifting lever 48 shown in phantom lines in FIG. 1 and shown in an exploded view in FIG. 4, to the reverse position.
- Passage 50 opens the bypass air passage 50 to the flow of pressurized air.
- Passage 50 receives the incoming pressurized air through an opening 55 from cavity 56 which is located on the feed side of throttle valve 16. Opening 55 is always open to receive incoming air, but in the forward operation of the motor, passage 50 is closed by a ball valve 62 which is held against seat 64 by a compression spring 66.
- the ball valve 62 also controls the flow of air through passage 50 in reverse operation of the motor.
- pressurized air in cavity 74 imposes a force against a pressure-actuated exhaust deflector 76 which is slidably mounted on motor housing 12.
- the exhaust deflector 76 is forced by the pressurized air in cavity 74 against a compression spring 78, until the deflector stops against a circumferential ridge 80 on the motor housing 12.
- the exhaust deflector may be actuated by means other than the air pressure in cavity 74, such as by a valve or switch.
- deflector 76 As the exhaust deflector 76 slides up against the ridge 80, it closes off the atmospheric exhaust route used for forward rotation. A portion of deflector 76 is positioned to block the flow of air from radial holes 34 to muffler cavity 36.
- the incoming pressurized air in deflector cavity 74 is routed by deflector 76 from cavity 74 through the radial holes 34 to annular cavity 32.
- the pressurized air enters the rotor cavity 25 through slots 28 and drives the rotor 26 in a reverse direction (counterclockwise as shown in FIG. 2), causing the motor to run in reverse.
- a suitable method must be used to "kick-out" the rotor vanes 46, such as spring-means 47.
- the expended air is then exhausted from rotor cavity 25 through port 42, the rear end plate 24 and into cavity 22.
- Shifting lever 48 to the reverse position also opens a reverse exhaust port, thereby allowing air to flow from cavity 22 through passage 82 and out of the motor housing 12.
- a rotary valve 84 rotates inside bushing 86 to match up the openings 88 and 90 in the valve 84 and the bushing 86 respectively.
- FIG. 3 shows a cross-sectional view along line 3--3 of the reverse air exhaust system showing the rotary valve 84 inside bushing 86. In reverse mode, the air in cavity 22 is exhausted through passage 82, through openings 88 and 90 into the interior of valve 84.
- the speed of the motor in reverse can be controlled with lever 48.
- lever 48 As lever 48 is shifted to reverse mode, lift pin 68 forces ball 62 against spring 66, thereby opening the passage 50 to the flow of incoming pressurized air.
- the range of movement on lever 48 is variable and controls the flow of air through passage 50 and the motor speed in reverse by variably forcing ball 62 against spring 66 through lift pin 68 to allow air to flow through passage 50 in the reverse operation of the motor.
- FIG. 1 The embodiment of the present invention shown in FIG. 1 includes a turnbuckle collar 97 that contains deflector cavity 74.
- the collar 97 has an internal right-hand thread and an internal left-hand thread allowing the motor backhead to be oriented in any rotational position while orienting the motor into the motor housing 12.
- the reversible motor of the present invention can be used in almost any pneumatic tool. It is particularly adapted for use in a portable pneumatic tool such as a drill or nutrunner.
- FIG. 5 shows the motor 100 of the present invention incorporated within an automatic positive feed drill 102, although it would be capable of use in any type of drill.
- the drill 102 includes a drill head 104, a spindle 106, a gear section 108 and an air inlet 110.
- FIG. 6 shows the motor of the present invention incorporated into a nutrunner 114.
- the nutrunner 114 includes air inlet 116, motor 118, transmission section 122 and tool attachment 124.
- the invention describes a reversible air motor with radial vanes that is designed to achieve nearly the same horsepower in a forward rotation as a "forward-only" type of air motor.
- the invention also provides for manual control of the motor speed in a reverse rotation.
- automatic controls may replace the manually operated lever to control the operation of the motor in reverse mode.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims (18)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/045,934 US4740144A (en) | 1987-05-04 | 1987-05-04 | Reversible radial vane air motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/045,934 US4740144A (en) | 1987-05-04 | 1987-05-04 | Reversible radial vane air motor |
Publications (1)
Publication Number | Publication Date |
---|---|
US4740144A true US4740144A (en) | 1988-04-26 |
Family
ID=21940627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/045,934 Expired - Lifetime US4740144A (en) | 1987-05-04 | 1987-05-04 | Reversible radial vane air motor |
Country Status (1)
Country | Link |
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US (1) | US4740144A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5017109A (en) * | 1990-01-26 | 1991-05-21 | Ingersoll-Rand Company | Cylinder and housing assembly for pneumatic tool |
EP0581431A1 (en) * | 1992-07-27 | 1994-02-02 | Ingersoll-Rand Company | Pressure fluid motor having a power regulator |
US5611404A (en) * | 1995-09-28 | 1997-03-18 | Gpx Corp. | Hydraulic impulse tool with enhanced fluid seal |
EP0832721A1 (en) * | 1996-09-30 | 1998-04-01 | Yotaro Taga | Impact wrench |
US6105595A (en) * | 1997-03-07 | 2000-08-22 | Cooper Technologies Co. | Method, system, and apparatus for automatically preventing or allowing flow of a fluid |
US6192781B1 (en) | 1998-12-31 | 2001-02-27 | Cooper Technologies Company | Assembly for reversing a fluid driven motor |
US6431846B1 (en) * | 1999-12-06 | 2002-08-13 | Frederick L. Zinck | Reversible pneumatic motor assembly |
US6658986B2 (en) | 2002-04-11 | 2003-12-09 | Visteon Global Technologies, Inc. | Compressor housing with clamp |
US20060102367A1 (en) * | 2004-02-04 | 2006-05-18 | Etter Mark A | Pneumatically powered rotary tool having linear forward and reverse switch |
US20070217940A1 (en) * | 2006-02-15 | 2007-09-20 | Pneutech Manufactuer Co., Ltd. | Pneumatic tool with pressure-stabilizing cylinder |
US20090272554A1 (en) * | 2008-05-05 | 2009-11-05 | Ingersoll-Rand Company | Motor assembly for pneumatic tool |
US20110139474A1 (en) * | 2008-05-05 | 2011-06-16 | Warren Andrew Seith | Pneumatic impact tool |
US8739832B2 (en) | 2008-05-05 | 2014-06-03 | Ingersoll-Rand Company | Motor assembly for pneumatic tool |
US8925646B2 (en) | 2011-02-23 | 2015-01-06 | Ingersoll-Rand Company | Right angle impact tool |
US9022888B2 (en) | 2013-03-12 | 2015-05-05 | Ingersoll-Rand Company | Angle impact tool |
US20150158165A1 (en) * | 2013-12-06 | 2015-06-11 | Ingersoll-Rand Company | Impact Tools With Speed Controllers |
DE102015114827B3 (en) * | 2015-09-04 | 2016-09-15 | Gilbert Haf | Compressed air vane motor |
US9592600B2 (en) | 2011-02-23 | 2017-03-14 | Ingersoll-Rand Company | Angle impact tools |
US20190160644A1 (en) * | 2017-11-28 | 2019-05-30 | De Poan Pneumatic Corp. | Pneumatic rotary tool with airway switching structure |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1810176A (en) * | 1927-10-04 | 1931-06-16 | William F Bippus | Air motor |
US2257892A (en) * | 1939-02-23 | 1941-10-07 | Cleveland Pneumatic Tool Co | Reversible rotary motor |
US2575524A (en) * | 1946-10-10 | 1951-11-20 | Independent Pneumatic Tool Co | Rotary tool |
US3429230A (en) * | 1966-11-28 | 1969-02-25 | Robert C Quackenbush | Fluid driven motor |
US4040311A (en) * | 1974-06-10 | 1977-08-09 | Joe W. Page, Jr. | Dental handpiece |
-
1987
- 1987-05-04 US US07/045,934 patent/US4740144A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1810176A (en) * | 1927-10-04 | 1931-06-16 | William F Bippus | Air motor |
US2257892A (en) * | 1939-02-23 | 1941-10-07 | Cleveland Pneumatic Tool Co | Reversible rotary motor |
US2575524A (en) * | 1946-10-10 | 1951-11-20 | Independent Pneumatic Tool Co | Rotary tool |
US3429230A (en) * | 1966-11-28 | 1969-02-25 | Robert C Quackenbush | Fluid driven motor |
US4040311A (en) * | 1974-06-10 | 1977-08-09 | Joe W. Page, Jr. | Dental handpiece |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5017109A (en) * | 1990-01-26 | 1991-05-21 | Ingersoll-Rand Company | Cylinder and housing assembly for pneumatic tool |
EP0581431A1 (en) * | 1992-07-27 | 1994-02-02 | Ingersoll-Rand Company | Pressure fluid motor having a power regulator |
US5611404A (en) * | 1995-09-28 | 1997-03-18 | Gpx Corp. | Hydraulic impulse tool with enhanced fluid seal |
EP0832721A1 (en) * | 1996-09-30 | 1998-04-01 | Yotaro Taga | Impact wrench |
US6105595A (en) * | 1997-03-07 | 2000-08-22 | Cooper Technologies Co. | Method, system, and apparatus for automatically preventing or allowing flow of a fluid |
US6192781B1 (en) | 1998-12-31 | 2001-02-27 | Cooper Technologies Company | Assembly for reversing a fluid driven motor |
US6431846B1 (en) * | 1999-12-06 | 2002-08-13 | Frederick L. Zinck | Reversible pneumatic motor assembly |
US6658986B2 (en) | 2002-04-11 | 2003-12-09 | Visteon Global Technologies, Inc. | Compressor housing with clamp |
US20060102367A1 (en) * | 2004-02-04 | 2006-05-18 | Etter Mark A | Pneumatically powered rotary tool having linear forward and reverse switch |
US20070217940A1 (en) * | 2006-02-15 | 2007-09-20 | Pneutech Manufactuer Co., Ltd. | Pneumatic tool with pressure-stabilizing cylinder |
US20110036606A1 (en) * | 2008-05-05 | 2011-02-17 | Ingersoll-Rand Company | Motor assembly for pneumatic tool |
US7886840B2 (en) * | 2008-05-05 | 2011-02-15 | Ingersoll-Rand Company | Motor assembly for pneumatic tool |
US20090272554A1 (en) * | 2008-05-05 | 2009-11-05 | Ingersoll-Rand Company | Motor assembly for pneumatic tool |
US20110139474A1 (en) * | 2008-05-05 | 2011-06-16 | Warren Andrew Seith | Pneumatic impact tool |
US8347979B2 (en) * | 2008-05-05 | 2013-01-08 | Ingersoll-Rand Company | Motor assembly for pneumatic tool |
US8739832B2 (en) | 2008-05-05 | 2014-06-03 | Ingersoll-Rand Company | Motor assembly for pneumatic tool |
US9550284B2 (en) | 2011-02-23 | 2017-01-24 | Ingersoll-Rand Company | Angle impact tool |
US8925646B2 (en) | 2011-02-23 | 2015-01-06 | Ingersoll-Rand Company | Right angle impact tool |
US9592600B2 (en) | 2011-02-23 | 2017-03-14 | Ingersoll-Rand Company | Angle impact tools |
US10131037B2 (en) | 2011-02-23 | 2018-11-20 | Ingersoll-Rand Company | Angle impact tool |
US9022888B2 (en) | 2013-03-12 | 2015-05-05 | Ingersoll-Rand Company | Angle impact tool |
US20150158165A1 (en) * | 2013-12-06 | 2015-06-11 | Ingersoll-Rand Company | Impact Tools With Speed Controllers |
US9592591B2 (en) * | 2013-12-06 | 2017-03-14 | Ingersoll-Rand Company | Impact tools with speed controllers |
DE102015114827B3 (en) * | 2015-09-04 | 2016-09-15 | Gilbert Haf | Compressed air vane motor |
US20190160644A1 (en) * | 2017-11-28 | 2019-05-30 | De Poan Pneumatic Corp. | Pneumatic rotary tool with airway switching structure |
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